Liquid dispensing apparatus



m M 6 l o Y m .Jr 7N.. w E

Y 0Ctf7, 1947. c. F. PRANGLEY r AL LIQUID DISPENSING APPARATUS Filed Jan. 21, 1944 Oct. 7, 1947. 'Q F, PRANGLEY ET AL 2,428,383

LIQUID DISPENSING APPARATUS Filed Jan. 2l, 1944 2 Sheets-Sheet 2 Iig 75 l/z/rr/e fly/aer' Z7 @if l l l i l l c l l l l 1 535 fl ,-530 iai efzfmi iatente'c'l` Oct. 7, 1947 Curtis Piengley qndfltioliord ff'lro'rl'er, Evanston, 111.

invention ,to :provide :improved electrical 'fmeens for operating the registers of a, ydispensing Lappagratos, `which registers maybe located 'at a remote pointiivithrespectzto the dispensing linie iof ytrie dispensingJ :Yo-rions other obi-ectsfadvanteees andffe'atures of the invention Will be apparent from =tl1e1 =fo1 lQWilg s peoiaftiongwhen takenin vconnection with the aegonrpenyinglgdrawing's,swherein Certain p11 reiiernbodimerrtsere set forth -for'ipurposes ,o illustration- 'In `the girn xivings,A Whereinzlike reference -numerels refer to like parts-throughout:

lFigure 1" a new olevationend `pertin sectionl or si.V liqincl dispensing :apparatus embodying {ih e Present invention.,

-Figure isfevieiv invertir@ -section-taken-sub- 2 2 ofg`rligilre3- IViewgingerical :section taken subg the line 3 -73 o f Figurel Schemoiiofdieeram of theeieetnc the fpresent invention. metio-view o f ra. vrote of f rn-lforming :part of the preslreritinvoiitionf. 1euro visairoe eritoryfriewfinelevation, and

eerily in sooiion :illustrating ekmodmed fformof :thegpreseniirlvoriion` v-Riiffol1i1iignowgto; emawinesin detail, there is shown in 1 athge :usual .time of :gasoline reservoir, preferably an underground tank' 2,and ,egpipe' :thriving thesusuol Ltoot valve not shown) zot-it Wer-portionnndfextendingatitsuppored ynonsing B Whioh mayibe-of any desired'type 109 taining, the pumping mechanism. The spire 'zOllllQCiQdiwiihlll'jthehousing to the suction .side 0f oriy i11 s1 1o1'fpi iinp= fhavine between its eX- Y:: 11.fillSi"/:@Il d.1 iritolioisiolese bypass' line lo controlled lgyfa pressure responsive f bypassvalve L2. *The pp rnp "8` supplies fthe liquid to a 4dispensing line nich loom-mises 1o A'pine 1;4. which fdisoharees the quid iiliororinir eliminator I;6 'of the usuol oon- Qiiorig: epip 4%. which, leads :from ihr. oir iifinoisilr! G, to efooirrentioiiel meter, o pine p12-2 into Which-,the liqudimeasuredmy the lmeter is -diseharged,' a rsiglit` glass and hosefttinglfl to ing house 2S andai nozzle avalve'ia'tssembly f2.8 with theusual' leverlcontrolled dispensing yvletlve. 'Ifhe -nozzle valve assembly is supportedwhen `ri'otfin use onthe oonvenionalSupportingbraoket r3i] s ecured to iainouterweu of 'the housingvandmvhen in such position, prevri'tsi operation Orietmgtnuf `elly- .'iletueted switch Y operating :lever h3 1! which, `through airodkectuates a'switch 316 (Figure 4") .to energize and de energ-ize :the vsystem:

, Anieleetricimotori,'preferably a s inglephase,

alternating rourrentsytnohronous motor-Lis con- @moeten-tothe supplyrlinesgln-il :and through `the :nozzle control switoh 13.6 and is me chemically connected through suitable gears end ffshavts 'tio tl'iegpump 8 to drive the latter, as yindicated vin Flegrei. l

The meter 20 may be oiiany'iisiitlionstruotion finswhioh elements :displacedloythe flow of liquid throuehihemeier ooilioio @meier shaft-4.0, motor Shoitikoorrios @Speed-regulating governor 4 2 of any Suitable :knownisiruoiiirerharineo speed responsive displacealblerneniben suoli es the yole 44, Connectedfoolbrlevor, 48 ondzorank vio o Spoed regulating, :veli/e '12 offany Suitable 'known oonsirliotio terp din tliepipe :18 bofiweeil aille Voir. eliminator ond :the I rieter The vSiooed regulator .or governors isi so I oalilorotefithat Joy operoii-oiiofihe speociiroeulating valve 5 2, itmointains ihoyflow ofiiuid through the dispensinelino at o constant rate-so ione Sas iheidimoriinefvalveisiully open. 'i'hedispensing whiohis ihonozzleessenrbiy-Z i ss oi .the iii- Po vf ifliiolo is oiiherfiillly @o r :fully oft; so that -wheniis operatingiharidlefis'depressed, therelve -m0VS immodio tely-to fiullyfopen' lposition and remains in'ihotfpositiones long aszthefiever is held o depressedxpoSitionbytheoperator, ondimovs to fully closedposition whengthe flever fis released. Thus, so long as the nozzle ;aotueting-lever isdonressem.ilioflilid,isfdispe d als oretedeterin dfs-byiheeiiifigrond calibration of the'gov- 'with differentially acting coils the top of the housing, in the customary manner. Y The actuating shaft 58 for the volume register 54 is driven by an induction meter motor mechanism 60 mounted in any convenient manner in the housing and below the registers, while the actuating shaft 62 for the cost register'56 is driven by an induction meter motor mechanism 64 similarly mounted in the housing below the registers. -An electrical price variator or device 66 is also-mounted in the housing in any convenient position, and is provided with an adjustment knob 68 for setting the price variator, whichknob is connected to a shaft interconnected through a gear box 12-to the adjusting shaft'14 of a unit price indicator 16 ofthe usual structure.`

induction meter motor 64, through a cable 18, to control the operation of this induction meter in Y stitutes the potential or voltage coil for the in,-

15' The electrical price variator 68 is connected to the n Y is connected to the terminals-|58 and |62, wire |64 of the cable being connected to terminal |56 n accordance with the setting of theprice variator A A pressure control switch device `60 has a pressure responsive actuating element 82 connected to the pipe 22, while its actuating switch mechanism 84 is connected by a` cable 86 to the induction meter motor 60, by a cable 68 to the induction meter motor 64, and by cable 90 to a suitable source of supply, indicated in Figure 4 as supply lines L-l and L-2.

The pressure control switch device 66, therefore, controls the energization and deenergization of the induction meters 66 and 64 in` response to the pressure in the dispensing line so that when the valve is opened-and liquid flows freely through the dispensing line at a relatively 'low pressure, these induction meters are energized and when, on closing of the nozzle valve, the pressure in the dispensing line rises to the `value set by the bypass valve 2, theinduction meters aredeenergized.

The price variator 66, as shown in Figures Yand 3, comprises an explosion-proof housing 92 in which is mounted a resistor, rheostat or potentiometer 94 having its opposite ends connected to terminals 66 and r96, and a wiper arm |66 mounted on a manually adjustable shaft |02 projecting through the forward wall of the housing and provided with an operating knob |04. The

-shaft |02 also extends through the opposite wall of the housing and carries a gear |06 meshing which extends into the gear box 12 that drives the unit pricerindicator 16. The wiper arm |00 is 'secured to, but insulated from, the shaft |02 Sand Vits annular hub portion engagesa spring pressed contact pin V| |0- mounted in a. terminal block the contact pin ||0 being connected to a terminal ||2. The terminals 96, 96 and ||2 are mounted in an appropriate manner in the housing 92 and are'connected 4to the ends of the three-wire cable 18 which extends to the induction meter motor 64.

As shown in Figure 4, the induction meter motor 60 for driving the volume register comprises a conductive disk 4, preferably of aluminum, secured to a spindle ||6 journaled in suitable end bearings I|8 and provided with a worm or other Vgear |20 meshing with a worm -wheel or other gear |22 on a suitably mounted shaft |24, carrying a second gear meshing with a gear |26 on thebottom of the register actuating shaftl58. The `disk 4 is drivenby magnets- |28 and; |30 and braked byamagnet |32. 'Ihe magnet |28 is provided |34 and l|36Ycon.-

nected at their innerends, as at |38, and con;-

-nected attheirffree 'ends-through balancing,

with a gear |08 carried by the'vertical vshaft lilV duction meter motor while the diierentially acting coils |34 and |36, acting together, constitute the series or current coils'for the induction meter motor. The wire |52 extends from the resistor |48 to the coil |54 of the braking electroymagnet |32; the other side of this coil being connected by a wire 56 to a terminal |58. The wiper arm |60 of the potentiometer or rheostat-44 is connected to the terminal |62. The cable 86 and wire |66 being connected to terminal |62.

It will be evident, ofcourse, that where necessary, a transformer may be connected between the cables 66`and 60 as between the `cable 90 Yand the supply lines L| and L-2 to provideA proper operating voltage'for the induction meter device 42.

The braking coil |54being`r properly proportioned to the series and potential coils, the speed of the disk is made independent of changes in the voltages, or frequency changes of the supply 4 line. As the voltage or frequency changes, the

driving torque applied to the disk bythe magnets 28 and |30 varies, 'but at the same'time the braking force or torque exerted by the magnet |32 varies in an opposite or compensating sense, so that for all practical purposes the Vspeed-ofthe disk is independent of thevoltage and frequency and is determined solely by the position of adjustment of the wiper arm |60. The adjustment of the speed of the induction meter motor being thus so readilyY accomplished -by the'simple adjustment of the wiper arm |60, it may be maintained in perfect accuracy by periodic` 'adjust-f ment by the inspection oii'icial so thatthereV is no need to put a pump out of commission by condemnation if the accuracy is not perfect, a's-such v oiiicial may effect vthe simple-adjustment at the time of inspection and reseal the explosion-proof housing in which the induction meter motor ls i mounted.

The induction meter motor 64 is generally similar to the induction meter motor 60,- but the speed Vthereof is also governed by the price variator 66 in accordancev with the price per unit volume of liquid dispensed. This induction meter motor,

y therefore, comprises a'conductive disk |12y similar to the disk ||4 and similarly connectedto'its register operating shaftY 62 by which the cost register is driven. I The disk |12 is driven byelectromagnets |14 and |16 and brakedby an electromagnet |18. The electromagnet |14 is, in this instance, provided with two sets of differentially `acting coils, oneset comprising a coil |80 and a coil |82, and the other setcomprisingauco'il i n Y dires gilet-analicen@calibrated *and "balancing resistors v1|? 8and 200 "to the end terminals 202 and 24' of a :resistor, rheostajt or termali@ e connected l by wires 1'2"30 and '232, respecwire 2 3 8 of themcable 18 Ais connected from the 5 tei@ -i2=tQltiieieiminni 22s of the induction mete'rlinotor. The induction meter motor 64 operates similarly ,to theinduction meter motor 60, but integrates, 'in eiiect, the constant rate of .flow jof the liquid withthe adjusted price per ffwo induction .meter motors `deen'i-:rgized until the y140 nozzle valve is opened and the pressure in the dispensing line has dropped to the normal dispensing pressure, at which time the switch 84- is automatically closed and the induction meter motors thereby energized.

It is to be noted that the nozzle switch controls the starting and stopping of the motor 38, while the pressure switch does not, and, further, that regardless of whether the pressure switch is open or closed, the induction meter motors cannot be started until the nozzle valve assembly is removed from its supportl and the switch 36 manually closed.

As shown in Figure 6, the single induction meter motor 60 drives both' the volume register 54 and the cost register 56. For this purpose, the register actuating shaft 58 for the volume register is connected by gears 240 and 242 to a shaft 244, in turn connected by gears 24B and 248 to a shaft 250 which, through any suitable mechanical variator 252 that is adjustable in accordance with the unit price per volume of liquid dispensed, drives the actuating shaft 62 of th'e cost register. Through suitable shafts and gearings, the mechanical variator 25'2 is connected in the usual manner to the price .indicator 16.

In both forms of the invention, the registers are driven independently of the meter 20 without any mechanical or governing connection therebetween, and yet register accurately the volume and cost of th'e liquid dispensed and are under the control of the operator so that they are energized and deenergized with the initiation and termination of each dispensing transaction.

It will be evident from the foregoing that apvrespect to thesaispfensing 1in-e infine apparatus. is not "limited to 3the nc details of "cbrstructin v"disclosed 'h'ereiin scapa of other'modifi'caticnsandclianges without'{de partin'gl fromt-he fspirit v-and scope "of tii-eapienneu'ciniins. f i

register, electrically operable motbrmeans'diivntarriedl'cb'nstant rate fof said line, and price v'ad-justcth he fsettingthe sped'fof peration'ofthe'motormeans fruiting Lthe ctgregistjer'edin Ap'report-inn to Atintin "it "ei-pricep'runit volume of Vliquid dispensed and 'the constant irate `0f -flOW1 Of tile flquidthIOugh vthe ldispensing line.

3. In a liquid dispensing apparatus, the combination of a source of liquid supply, a pump, the suction side of which is connected to said source, a dispensing line connected to the outlet side of said pump and through which liquid is forced by said pump, a dispensing valve in said line having an open position and a closed position, flow regulating means in said line, means responsive to the flow of liquid through said line and connected to said flow regulating means to maintain a constant rate of flow of liquid through said line when said valve is open, registering means having a volume registering portion and a cost registering portion, electrically operable motor means independent of said W responsive means for driving the volume registering portion of the registering means, said motor means including electrical speed presetting means preset to cause the speed of driving the volume registering portion to be in iixed ratio to the constant rate of flow of liquid through said line, electrically operable motor means for driving the cost registering portion of the registering means, said last mentioned motor means including electrical speed control means for adjustably presetting the speed of driving the cost register in proportion to th'e constant rate of ilow of liquid through said line and the price per unit volume of liquid dispensed, and means for initiating and terminating operation of both said motor means simultaneously on opening and closing of said dispensing valve.

4. In a liquid dispensing apparatus, the combination of a source of liquid supply, a pump, the suction side of which is connected to said source, a dispensing line connected to the outlet side of 7 Asaid prima a dispensinrvalve in Seid line and havingan open v'position and a closed position,

widow. responsive and regulating means .for 4main'- taining a const antrate of ovvof liquid through said line' when said valverlis open, mechanical registering means` for registering the -costlf the liquid dispensed, V electric motor means: :independent ofsaid ovvresponsivefand regulating means for driving the said registeringmeans, electrically operable speed control means-adjustablypresetsaid pump, a dispensing valve in said line and A having an open position and a closed position,

flow responsive and regulating means for maintaining a constant rate of ilow of liquid through v said line when the valve is open,fm eans for registering the volume of liquid dispensed through said line, electrically operable motor means independent of said ow responsiveand regulating means Vfor driving the said volume register inproportion to the constant rate-,pf flow of liquid through said line, and means responsive to the opening and nl closing `of said valve for initiating and terminatg ing the operation*V of said motor means.

Y 6. In a liquid dispensing device, a sourceof liquid under pressureconnected to a dispensing Eline, a valveior controlling thegiiow of liquid Vthrough said line, ow regulating means for,v

maintaining a constant rate of flow of liquid unit-factor to be indicated. Y Y

throughY` said` line wwhen saidk valve is opened, an

.indicating register,V anV 'electric' motorconnected tofdrive isaid register at Yaspeed ,proportionalfto ,-tlieiiovvfof liquid through said dispensing line, V`and' means foradjusting the speed of said motor togoperate'saidgregister in accordance .with the atio'b'etween a unit of liquid dispensed and/la.

--7.In-a liquid dispensing device,Y a source of 5liquid under pressure Y connected` to. a dispensing Vlinefa`valvefor*controlling the Yflow of liquid vthroughv said line, flow Vregulating means for maintaining'a constant rate-of ow of liquidV through saidline when said valve Yis opened, an

ir'1dicating, register, an electric motor connected l to drive said register at a speed proportionalto 'n the lowof liquid through said dispensing line,

Ameans for adjusting Athe speed of'said motor so. Y as to beproportionate` at eachrinstant tothe constant 'rate of flovv-ofliquid through saiddispens g ing line,ande1neans for adjusting the speed of saidmotor to operate said register in accordance withaselected ratio between a unit of liquid dispensed and a unit register. f Y Y l Y e. CURTIS F. PRANGLEY. RICHARD R.. TREXLER.Vv

RFERENCES CITED The following references le of this patent:

UNITED STATES PA'I'EN'ISY vDate Number NameV 2,151,239 Slye et a1 Mar. 21, 1939 2,013,533 Y Webb Oct. 22, 193 FOREIGN PATENTS Y .Number VCountry DateV factor to be indicated V'by said areI of Vrecord in the France nec. 26, 1932 

